Composer Install - Shell-Bash

Introduction

As a programmer, you often need to work with external libraries and dependencies, which can be a headache to manage. Composer is a dependency management tool that streamlines the process of installing, updating, and managing these library dependencies in your PHP projects. Composer is a command-line tool that you can use to manage your dependencies, add new packages, and update packages to new releases.

Installation

To use Composer, you first need to install it on your system. Here are the steps to install Composer on a Linux system:

1. Open the terminal or SSH into your Linux system.
2. Update the package manager: sudo apt-get update
3. Install dependencies: sudo apt-get install curl php-cli php-mbstring git unzip
4. Download Composer: php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
5. Verify Composer signature: php -r "if (hash_file('sha384', 'composer-setup.php') === ' ', true, false) { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
6. Install Composer: sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer
7. Verify the installation: composer --version

Usage

To use Composer, navigate to your project's root directory using the command line, and run the following command:

composer install

This will read the composer.json file in your project's root directory and install all dependencies listed in it. If you subsequently modify the composer.json file, you can run composer update to update the packages.

Conclusion

Composer is a powerful tool that simplifies the management of external libraries and dependencies in your PHP projects. With Composer, you can easily manage your dependencies, install new packages, and update packages to newer releases. By following the installation and usage steps outlined here, you should be able to start using Composer in your PHP projects with ease.